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In addition to setting the clock frequency, the main must also configure the clock polarity and phase with respect to the data. Motorola [4] [5] named these two options as CPOL and CPHA (for clock polarity and clock phase) respectively, a convention most vendors have also adopted. SPI timing diagram for both clock polarities and phases. Data ...
Most SPI master nodes can set the clock polarity (CPOL) and clock phase (CPHA) with respect to the data. This timing diagram shows the clock for both values of CPOL and the values for the two data lines (MISO & MOSI) for each value of CPHA. Note that when CPHA=1, then the data is delayed by one-half clock cycle. SPI operates in the following way:
Target operating voltage ranges of 1.62V to 5.5V are supported as well as the following clock ranges: Supports JTAG & PDI clock frequencies from 32 kHz to 7.5 MHz; Supports aWire baud rates from 7.5 kbit/s to 7 Mbit/s; Supports debugWIRE baud rates from 4 kbit/s to 0.5 Mbit/s; Supports SPI clock frequencies from 8 kHz to 5 MHz
Radio clock. Time signal station to radio clock. Technology Max. rate Year IRIG and related: 1 bit/s ... LR-VDSL2 (4 to 5 km [long-]range) (symmetry optional)
Synchronous Serial Interface (SSI) is a widely used serial interface standard for industrial applications between a master (e.g. controller) and a slave (e.g. sensor). SSI is based on RS-422 [1] standards and has a high protocol efficiency in addition to its implementation over various hardware platforms, making it very popular among sensor manufacturers.
When the PHY drives the MDIO line, the PHY has to provide the MDIO signal between 0 and 300 ns after the rising edge of the clock. [1] Hence, with a minimum clock period of 400 ns (2.5 MHz maximum clock rate) the MAC can safely sample MDIO during the second half of the low cycle of the clock.
The bit clock pulses once for each discrete bit of data on the data lines. The bit clock frequency is the product of the sample rate, the number of bits per channel and the number of channels. So, for example, CD Audio with a sample frequency of 44.1 kHz, with 16 bits of precision and two channels (stereo) has a bit clock frequency of:
The unit interval is the minimum time interval between condition changes of a data transmission signal, also known as the pulse time or symbol duration time.A unit interval (UI) is the time taken in a data stream by each subsequent pulse (or symbol).